2003 Jeff (22) - Code 22 - 04W Questions 1 to 15: Prof....

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Code 22 - 04W page 1 Questions 1 to 15: Prof. Jefferies’ Lectures 1. Which statement is FALSE ? a. An implicit assumption of the logistic equation is that all individuals have identical properties. b. Values of r (intrinsic rate of natural increase) for different species generally decrease with an increase in body mass. c. The value of K (the carrying capacity) is a fixed value for a given species. d. In the equation describing geometric increase in population growth, N (t) = N (o) e rt , there is an inverse relationship between r (intrinsic rate of natural increase) and t (time). e. Geometric growth of a population leads to a stable-aged population. 2. A new virulent virus, that is carried by mosquitoes which only attack a live pest, is introduced in a pest population. Which one of the following biological responses is NOT likely to occur? a. A change in the genetic structure of the pest population is likely to occur. b. New viral strains will arise. c. Viral strains will differ in their virulence. d. The virus will become more virulent. e. A change in the genetic structure of the virus is likely to occur. 3. A fish population shows logistic growth. If the population is harvested, which indicates the best potential for recovery of the population following harvesting? a. When the population is at the carrying capacity (K). b. When the growth increment at harvest is minimal. c. When the population size is about K/2. d. In the lag phase of population growth. e. When the growth increment is half the maximum value. 4. Which statement is CORRECT ? a. A mimic feeds on the same food plant as the target species. b. Mimics are not rare relative to the target species. c. Mutualistic interactions between species do not change. d. Aposematic colouration of larvae attracts predators that feed on the larvae. e. Mimics evolve at a faster rate than the species which they mimic. 5. Which statement about the niche is FALSE ? a. Different species cannot occupy the same niche. b. The niche is multidimensional. c. The niche includes both biotic and abiotic components. d. Character displacement allows species to occupy the same niche. e. The realized niche is usually less in spatial dimension than the fundamental niche.
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Code 22 - 04W page 2 6. Which statement is FALSE ? a. The logistic growth equation predicts the effects of density-independent growth. b. Most individuals in populations are clumped. c. The rate of increase in population numbers (dN/dt) is directly proportional to population size when growth is exponential. d. Different ramets produced clonally by an individual are the same genet. e. Most annual cohorts of young produced by breeding birds show a Type III survivorship curve. 7. Why was the eradication of ragwort ( Senecio jacobaea ) in agricultural fields in Nova Scotia successful?
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This note was uploaded on 11/24/2010 for the course BIO BIO150Y1Y taught by Professor Barret,thomson during the Spring '07 term at University of Toronto- Toronto.

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2003 Jeff (22) - Code 22 - 04W Questions 1 to 15: Prof....

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